rs745319034

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_014270.5(SLC7A9):c.614_615insA(p.Asn206GlufsTer3) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000515 in 1,613,766 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00055 ( 0 hom. )

Consequence

SLC7A9
NM_014270.5 frameshift

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:10

Conservation

PhyloP100: 2.33

Variant links:

Genes affected

SLC7A9 (HGNC:11067): (solute carrier family 7 member 9) This gene encodes a protein that belongs to a family of light subunits of amino acid transporters. This protein plays a role in the high-affinity and sodium-independent transport of cystine and neutral and dibasic amino acids, and appears to function in the reabsorption of cystine in the kidney tubule. Mutations in this gene cause non-type I cystinuria, a disease that leads to cystine stones in the urinary system due to impaired transport of cystine and dibasic amino acids. Alternate transcript variants, which encode the same protein, have been found for this gene. [provided by RefSeq, Jul 2011]

SLC7A9 links:

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 19-32862207-C-CT is Pathogenic according to our data. Variant chr19-32862207-C-CT is described in ClinVar as [Pathogenic]. Clinvar id is 288197.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC7A9	NM_014270.5 linkuse as main transcript	c.614_615insA	p.Asn206GlufsTer3	frameshift_variant	6/13	ENST00000023064.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC7A9	ENST00000023064.9 linkuse as main transcript	c.614_615insA	p.Asn206GlufsTer3	frameshift_variant	6/13	1	NM_014270.5	P1

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000265

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000147

AC:

AN:

251254

Hom.:

AF XY:

0.000155

AC XY:

AN XY:

135834

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000264

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000555

AC:

811

AN:

1461466

Hom.:

Cov.:

AF XY:

0.000549

AC XY:

399

AN XY:

727094

show subpopulations

Gnomad4 AFR exome

AF:

0.000149

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000696

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000695

Gnomad4 OTH exome

AF:

0.000381

GnomAD4 genome

AF:

0.000131

AC:

AN:

152300

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74472

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000265

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000356

Hom.:

Bravo

AF:

0.000170

EpiCase

AF:

0.000545

EpiControl

AF:

0.000474

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Cystinuria

Pathogenic:5

Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Jun 30, 2021	- -
Pathogenic, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 28, 2017	The SLC7A9 c.614dupA (p.Asn206GlufsTer3) variant, also referred to as c.799insA, has been reported in five studies in a total of 33 individuals with cystinuria, including three homozygotes, eight compound heterozygotes, and 22 heterozygotes with varying disease types (Leclerc et al. 2002; Font-Llitjos et al. 2005; Barbosa et al. 2012; Rhodes et al. 2015; Halbritter et al. 2015). Control data are unavailable for this variant, which is reported at a frequency of 0.00017 in the European (non-Finnish) population of the Exome Aggregation Consortium. The p.Asn206GlufsTer3 variant results in a frameshift, and is predicted to truncate the protein. While cystinuria generally displays an autosomal recessive mode of inheritance, some heterozygous carriers of variants in the SLC7A9 gene have abnormal urinary amino acid patterns and an increased risk of kidney stones (Eggermann et al. 2012). Based on the evidence and due to the potential impact of frameshift variants, the p.Asn206GlufsTer3 variant is classified as pathogenic for cystinuria. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -
Pathogenic, no assertion criteria provided	literature only	OMIM	Nov 01, 2002	- -
Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Nov 16, 2023	- -
Pathogenic, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Sep 15, 2017	The p.Asn206GlufsX3 (NM_014270.4 c.614dupA) variant in SLC7A9 (also referred to as c.799insA or c.800?801insA in the literature) has been reported in at least 2 5 heterozygotes, 2 homozygotes, and 2 compound heterozygotes with cystinuria (Le clerc 2002, Font-Llitjos 2005, Barbosa 2012, Rhodes 2015, and Halbritter 2015). Twenty one heterozygotes were noted to have non-type I cystinuria (heterozygotes with moderate to high excretion of cystine in urine and risk of forming urinary tract stones) (Font-Llitjos 2005, Barbosa 2012, Halbritter 2015). This variant has also been reported in ClinVar (Variation ID#288197), as pathogenic by two la boratories. It has been identified in 0.024% (30/126,648) of European chromosom es by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs745319034). This variant is predicted to cause a frameshift, which alte rs the protein?s amino acid sequence beginning at position 206 and leads to a pr emature termination codon 3 amino acids downstream. This alteration is then pred icted to lead to a truncated or absent protein. Loss of function of the SLC7A9 g ene is an established disease mechanism in cystinuria. Variants associated with non-type I cystinuria, such as this variant, are inherited in an autosomal domin ant manner with incomplete penetrance and cause more severe disease in the homoz ygous or compound heterozygous state. In summary, although additional studies a re required to fully establish its clinical significance, the p.Asn206GlufsX3 va riant is pathogenic for cystinuria in an autosomal dominant manner with incompl ete penetrance based on its occurrence in affected individuals and a predicted n ull effect. -

not provided

Pathogenic:4

Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Oct 05, 2023	This sequence change creates a premature translational stop signal (p.Asn206Glufs*3) in the SLC7A9 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SLC7A9 are known to be pathogenic (PMID: 11157794, 16838140, 25296721). This variant is present in population databases (rs745319034, gnomAD 0.02%). This premature translational stop signal has been observed in individual(s) with cystinuria in the heterozygous state (PMID: 12371955, 15635077, 16834950, 19782624, 21255007, 25109415, 25296721, 25964309). It has also been observed to segregate with disease in related individuals. This variant is also known as 799insA and c.800-801insA. ClinVar contains an entry for this variant (Variation ID: 288197). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 01, 2016	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Oct 11, 2022	Observed in multiple unrelated patients from different ethnic backgrounds with type II and type III cystinuria or with cystinuria and nephrolithiasis in published literature (Leclerc et al., 2002; Halbritter et al., 2015); Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 12371955, 26990548, 25296721, 30609409, 29431110, 28717662) -
Pathogenic, criteria provided, single submitter	clinical testing	Blueprint Genetics	Oct 16, 2018	- -

SLC7A9-related condition

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Nov 30, 2023

The SLC7A9 c.614dupA variant is predicted to result in a frameshift and premature protein termination (p.Asn206Glufs*3). This common pathogenic SLC7A9 variant in the heterozygous state has been reported to cause moderate or severe cystinuria in different families, suggesting an autosomal dominant mode of inheritance (reported as 799insA at Leclerc et al. 2002. PubMed ID: 12371955). This variant has also been reported in the homozygous or compound heterozygous state in many unrelated individuals to cause cystinuria (Rhodes et al. 2015. PubMed ID: 25964309; Bisceglia et al. 2010. PubMed ID: 19782624; Barbosa et al. 2011. PubMed ID: 21255007). In summary, the c.614dup is classified as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over